I developed a password manager application using the MERN stack, featuring user authentication and login. Users can store and retrieve passwords for accounts like Google, Facebook, and Instagram, all protected with AES 256 encryption. The idea arose when my free password manager service license expired, prompting me to create my own solution instead of paying. This project not only provided a cost-effective alternative but also allowed me to customize features, enhancing my skills in full stack development and security measures.